User's Manual

ADCP-75-132 • Issue 2C • August 2006

Page 24

MOUNTING STUD

LENGTH - 1.5 INCHES (38 mm)

DIAMETER - 0.875 INCHES (22 MM)

DIAMETER - 4.2 INCHES (106.7 MM)

DEPTH - 0.91 INCH (23 MM)

2.4 INCHES

(61 MM)

0.29 INCH

(7.4 MM)

3 INCHES

(75 MM)

5.5 INCHES

(140 MM)

6 INCHES

(152 MM)

1.4 INCHES

(36 MM)

2.5 dBi GAIN CEILING-MOUNT

OMNIDIRECTIONAL

4 dBi GAIN

CEILING-MOUNT

HALLWAY

8 dBi GAIN

90 DEGREE DIRECTIONAL PANEL

(WALL/CORNER-MOUNT)

18079-A

INCLUDES ADJUSTABLE

MOUNTING BRACKET

(NOT SHOWN)

Figure 12. 1900 MHz DRU Antenna Options

3.8 External Alarm System Reporting Requirements

The DHU provides normally open (NO) and normally closed (NC) form C dry alarm relay

contacts for reporting minor and major alarms to an external alarm system. A minor alarm is

defined as a high temperature condition. A major alarm is defined as any fault condition

except high temperature. Connections to the alarm contacts are provided through a screw-type

terminal strip. Category 3 or 5 cable should be used for the alarm wires. If an external alarm

system is not in use, no alarm connections are required.

3.9 Maintenance Requirements

The Digivance ICS requires no regular maintenance to insure continuous and satisfactory operation.

Maintenance, as it applies to the Digivance ICS, primarily involves diagnosing and correcting

service problems as they occur. Faults and failures arising from within the Digivance ICS will

generate an external alarm response which includes lighting an LED indicator(s) and closing or

opening a set of alarm contacts. When an alarm is reported, it will be necessary to isolate the source